OpenOffice.org vclmi.dll Integer Overflow

2012.05.17
Credit: Tielei Wang
Risk: High
Local: No
Remote: Yes
CWE: CWE-189


CVSS Base Score: 7.5/10
Impact Subscore: 6.4/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 CVE-2012-1149 OpenOffice.org integer overflow error in vclmi.dll module when allocating memory for an embedded image object Reference: http://www.openoffice.org/security/cves/CVE-2012-1149.html Severity: Important Vendor: The Apache Software Foundation Versions Affected: OpenOffice.org 3.3 and 3.4 Beta, on all platforms. Earlier versions may be also affected. Description: The vulnerability is caused due to an integer overflow error in the vclmi.dll module when allocating memory for an embedded image object. This can be exploited to cause a heap-based buffer overflow via, for example using a specially crafted JPEG object within a DOC file. Mitigation OpenOffice.org 3.3.0 and 3.4 beta users are advised to upgrade to Apache OpenOffice 3.4. Users who are unable to upgrade immediately should be cautious when opening untrusted documents. Credits The Apache OpenOffice Security Team credits Tielei Wang via Secunia SVCRP as the discoverer of this flaw. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAEBCgAGBQJPs8AZAAoJEGFAoYdHzLzHP18P/jAzoagU2m7A6xmlrnM0obXE J/+jkn/1T9SeUZqoV8Kxj3Xm079824SkGCfV+Vh449aEjz9mOcYeYdzF/Q2bLHUc 5+RASR10/KGUrONwTW7Y7aHgJKULqACayEAibtJdjTQf2c6bmPQtP0NvqBvqRnwO I47wgF3nz7yTzmyJxCbM4c2zZl5yZ4fV+PScu4oignKCKWdihGWpyCsC68uaCaNL /++Ef62uFg0ZhCHxbMeeg6XxG/I0AwDuCjLJucmZiTMFalVRilZ7RAJTq333pZO5 Ll1gOZhVFMahYWUuyRfEvSxthd1/XH8qSqaqZ7iIW636QorSReexCbyU6L8D+/J9 y5Z/ldgjT37/Y2HOtshugZ2/YYasORQRDG6dcfTsagBSz0t6NI8XjZ5HrOv2A+gq 2tUokw5wRWd0U/oi6HZVwbgsE93WlK2TacHKJEs3Ej7g9t/hmeQKlkgczy0DH7WB sDNadAqJLCzgc/84MY4ZDDSx9bmYUJGwXJwo0yGtZEVdSD9sJbnVqw6pLBZoLXRZ hAkaBnCJTackjfzaisd7+x+iLVUp1S2fllcTAoNUMehRhjtCP8MCwIqcEQL+QUyj yQRcFO4+r20NTGNPaAiwanu/H4tUe+HZErh2T/NEWh4LXqrxdQWbVHMTFLM4BNgX cKjC87ugWCKXVyyTQKiA =HHf0 -----END PGP SIGNATURE-----

References:

http://www.openoffice.org/security/cves/CVE-2012-1149.html


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